sds-聚丙烯酰胺凝膠電泳(參考版)
2025-05-10 18:13本頁面
【正文】 （ 5）偏斜現(xiàn)象 電極放置不平行 引起或 加樣位置偏斜 而引起 （ 6）帶太寬 加樣 量太多 或加樣 孔泄漏 引起 ? Molecular mass versus molecular weight ? Molecular mass (symbol m) is expressed in Daltons (Da). One Dalton is defined as 1/12 the mass of carbon 12. Most macromolecules are large enough to use the kiloDalton (kDa) to describe molecular mass. Molecular weight is not the same as molecular mass. It is also known as relative molecular mass (symbol Mr, where r is a subscript). Molecular weight is defined as the ratio of the mass of a macromolecule to 1/12 the mass of a carbon 12 atom. It is a dimensionless quantity. ? When the literature gives a mass in Da or kDa it refers to molecular mass. It is incorrect to express molecular weight (relative molecular mass) in Daltons. Nevertheless you will find the term molecular weight used with Daltons or kiloDaltons in some literature, o
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